Answer this question truthfully
### Question: What causes Incontinentia pigmenti?
### Response: Incontinentia pigmenti (IP) is caused by a genetic defect. In most cases, there is a problem with one of the genes located on the X chromosome.
Most babies born with IP develop discolored skin within the first 2 weeks. The discolored skin occurs when a substance called melanin builds up under the skin. Melanin gives skin its color.